Need an experienced developer to write 2 date pickers that can replace the standard Android "+/-" control.

The first one is a window that displays a month view centered around the current week. It allows to scroll months left/right. It marks current day with a frame and allows user to pick a date. After choosing the day it closes automatically.

The second one is a bit more sophisticated. It should work just like the one used in Gemini Calendar for Android. It allows to change day (or month) via scrolling/swiping on a separate stripe displayed on the screen.

Additional requirements:
- The visual side should be as clean and close to the original Android aesthetics as possible.
- Both should open as a possibly small window, not as a separate screen.
- It should run bug-free on the most popular Android phones like HTC Desire, Hero, Nexus One, Samsung Galaxy S, Droid.
- The picker will be used inside an application we develop, so we need good comments inside the code and full documentation, so that we are able to use and modify it later.

Please provide a portfolio with offers.